Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern.
As per your complain
swollen tongue along with small blisters in mouth can be due to Apthous Stomatitis causing apthous ulcers and can be caused due to a number of reasons like deficiency of iron and
vitamin B12,
allergic reaction, physical trauma, side effect of medicines, stress,
acid reflux etc..
It can also be due to Herpes virus infection causing cold sores.
I would suggest you to consult an Oral Physician and get evaluated and a thorough clinical evaluation can be diagnostic..
In case of apthous stomatits taking
multivitamin tablets, gargle with a numbing mouthwash, doing warm saline gargles and avoiding spicy foods can relieve..
In case of viral infection antiviral medications that is oral and topical antivirals like Acyclovir, Valacyclovir can relieve..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.